r1=2
n=7
r1!/n!
There are 3360 ways.
362,880 ways
15
10080
12
There are 3360 ways.
You can arrange and rearrange the word as many times as you like!There are 5040 different ways.
There are 30 ways.
362,880 ways
24 ways
15
10080
12
60
One... numbers
24
24 times